Lubricator for step bearings for extractors



W BARTHOLMEW.

LUBRIGATQR FOR STEP BEARINGS FOR EXTRAGTORS.

APPLlcMloM man SEPT. 15. 1920.

6, Patented Dec. 5, 192i Patented @en 5, i922..

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`Application filed September 15, 192?. Serial No. elmei'.

To' all whom t may concern.'

Be it known that l," VJiLLrAM Ban'rrior.- otrnw, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and tats of Illinois,have'invented certain. new and useful lmprovements. in Lubricators forStep Bearings for Extractorgof which the followingis a'specification.v

This invention relates to lubricat'ng devices for the stepfbearings ofcentrifugal machines, and particularly to that type of such bearingswhich mount the lower end of the spindlev in the universal joint throughthe medium of thrust and radial ball bean ings.

The invention has for its object to provide means for freely supplyinglubricant to the parts of the several bearings, froml an internal sourceand in a manner that will permit the lubricant to circulate freely amongthe parts to be lubricated. Accordingly, the invention consists'inconstructing the housing of the bearing with a lower reservoir,connecting a lubricant cup with said reservoir to keep it filled withoil up to a predetermined levely and supporting the ball rings andbearing races in a manner to permit the oil so supplied to rise4vertically around the parts and in such relation thereto as `to causethe oil to lowfreel'y through the bearings by the centrifugal action ofthe rotating parts; suitable deiiectors being provided for catching theoil that flows beyond the bear ings and draining channels, and portsbeing provided `tor collecting such oil and returning it to thereservoir.

ln the accompanying drawings is shown a vertical axial sectionof thestep bearing for the spindle of a centrifugal machine.

l represents the spindle, 2 the bell shaped pulley mounted thereon7 and3 represents the housing of the bearing whichI is mounted upon the baseor curb-4. The housing 8 is constructed witha shoulder 5 against whichis vseated the upper ball ring 6 thatreceives an upper zone of ball 7,while a lower zone of the ball is received in a lower ball ring 8supported upon the ball ring adjusting sleeve 9 which is threaded in thelower end of the housing 3 and held against unscrewing by the key 10which projects into the castellated crown of said sleeve. ln addition toflexibly supporting the spindle l, the ball 7 serves as a cage forthethrust bearing 11 and the radial bearing 12, into the former of whichthe spindle is stepped through means of its shoulder 13 and against thelatter ofwhich'itbears radially. Thrust bearing 1l is supported onshoulder lll of the cage ball 7 and is held down'byk means of the racelock nut l5 having set screw lo to resist its unscrewing. radialbearing` l2 is supported beneath the thrust bear-ing ll, and against theinterposed spacer ring 17, by means of the clamping nut i8 on the lowerend of the spindle. The inner rings rof the two ball bearings arepressed by the,y clamping nut 18 in vertical column against the shoulder13 of the spindle. The outer ring of the radial bearing being withoutvertical restriction except through the medium of balls and the outerring of the thrust bearing is cage ball 7. v

19 represents an oil 'deflector positioned between the shoulder 13a-ndthe inner ring ofthe thrust bearing 12 and this revolves with thespindle and hasy the eiiect of di-y sustained vertically in therect-ino" outwardly and toward ythe upper passageway/s 20, oil whichrises under the .centrifugal action of said deflector. Through saidupper passages 20 the oil enters the provisional reservoir 2l defined bythe spaced rings 6 and 8 the cage ball 7 and the housing 3 and keeps thestepping ball 7 and its rings 6 and 8 thoroughly `lubricated. Some ofthe oil may rise even as high as the under side of the bell pulley, butin that event will be caught by the deiect'or 22 and' directeddownwardly into the trough 23, whence it will escape through the ports24 back into the annular space around the bearings. From the provisionalreservoir 2l, oil may escape downwardly through lower ducts 20 into thebottom reservoir 25.

rlhe construction of the'housing 3 and the described'finethod ofsupporting the parts within it are such.' as to leave an ampleLreservoir 25 beneath tie end of the spindle and the open bottoniconstruction of the ball permits oil to flow freely therefrom upwardaround thethrust and spindle bearings.. Oil is kept in this reservoiryand up to a predetermined level in the spaces among i the bearing parts,by means of an oil cup 26 connected with said reservoir 25 through thetube 27. r)The cup 26 is elevated to insure the proper level of oilwithin the bearings and it will be adapted, by rglass side walls,l topLwindow or otherwise, for confleliii'ies, a housing, a ball spacedWithin rement observation, so that the oil may at all times be keptsupplied to the Working parts in proper quantity.

the Centrifugal displacing action of and the i'ree enti?,7 of oil ttonireservoir 25, a flushing and circulation. will be kept up 'from f onthroil i bearings Ill and 19 'sugli upper ducts 2O inte the provisionalrvoir 2l, and through lower ducts 2O o referifo" means er the neusing;cover 28 held v ,n i t eeuu@ the interior of the housing- 2 may ereadily' openedup and access to it had at any time.

l Claim: i

l. ln e, n bearing Yfor centrifugal niachines, the oonbination ofhousing, a ball, f nali pesitioninp` rings sunportel by oi saidhousing,` and leavir j i 'oir between them in the housl stepped inksaidball, and l oil to said reserwiir. step bearing 'for centrifugal ina--said e, ball-receiving rings placed around pper and lower limits oif thethe housing and ball, a reserl., and a spindle stepped in l opening;downward int-o eath it and haring eemreserreir ben nunuia'ion above withthe spaee between he; ball and housing.

` n i; step hearing); lor centriiuggal 1na. as, a housin ball spacedWithin said rings `placed around 'A v Y n ,j and lower imlts mi ine l, areser ball opening downward inte )eneath it and having; commu definingupper and lower limits of said surrounding reservoir space, and meansestablishing commui'iication between the last named space and the upperportion ofthe bali opening and between said space and said bottomreservoir.

ln a step bearing for centrifugal machines, the combination of ahousing, a ball and ball rings supported by the side walls of saidhousing, a spindle stepped in said ball and having a rotary bearing`therein, a defleetor Carried by said spindle, and means 'lor supplyingoil to the housing.

(ilu a step bearing for centrifugal machines, the combination oit ahousing, a ball and ball ringssupported by the side Wallsof housing,aspindle stepped in said ball nd havinga rotary bearing` therein, a defr earriedby said spindle, and means for tu )lying oil to the housing;said housing .g constructed with a reservoir between ts Wall and theball and said delieetor being ida `Vted to divert oil intosaid'reservoir.

a, in a stepbearing forr centrifuga-l machines, the combination of ahousing, an

' l ri in said housing, a ball, a g sustaining said ball against saidupper ball ring; with the reservoir spaced between said ball and saidhousing', a lspindle haring rotary' bearingsin said bali, a deliectorcarried by said spindle and duc*Vs reeeiiifing` oil from said -delleetorand ting it into said reservoir space.

i. ln a step bearing for eentriiiugalma- Chines, the combination of ahousinga spindle projecting downwarcljfinto said housing, anoil troughat the upper end of said housing` surrounding said spindle and having`ports through which it discharges .inte the housing, a detleetordepending toward said trough and surrminding;v the spindle l above saidhousing, bearings 'for said spindle within the housing, and means formaintaining a supplyv ol oil in the housing,

9. ln afstep b iii-ing; for eentriiiuiuil machines, the combination of abase, va housing supported on said base and providing` an oiltightreservoir, a ball ring` adjusting sleeve threaded into the lowerportion of said housing, a ball ringfitting said housing;` and supportedon saidsleeve, ay ballsupported on said ball ring, a spindle stepped insaid ball and having rotary bearings therein, and means for supplying,`oil to said housing.

Signed at Chicago, Illinois, `this 7th day or" Sept., 1920.

` WILLIAM v BARTHOLOMEW.

